4 results about "Isoprenol" patented technology

The invention relates to an isopentenol polyoxyethylene ether defoaming agent and a preparation method thereof, the defoaming agent is mainly prepared from a cross-linked acrylic copolymer emulsion, an alkali swelling thickener, a modified organic silicon defoaming active matter, a pH regulator (NaOH / KOH), an isothiazolinone bactericide, deionized water and the like in proportion, and the defoaming agent has excellent defoaming performance and stability. A specific auxiliary agent is added. The foam problem of an isopentenol polyoxyethylene ether product in downstream application is solved, and the defoaming agent is mainly applied to defoaming of isopentenol polyoxyethylene ether.

DEPCT6916 / 12 / 2568 This invention relates to a process for preparing 3-methyl-2-butenal (prenal) for... Prepare 3-methyl-2-butane-1-ol(prenol), for the preparation of diprenyl acetate of prenol, including for... Preparation of 3,7-dimethyl-octa-2,6-dienal(citral) where the amount of aldehyde in one reactant stream The current, or more precisely, is kept below the triggering value. Furthermore, this invention also involves... The product stream that can be obtained from prenol, prenol diprenyl acetate of prenol including citral;

The invention relates to a process for the preparation of 3-methyl-2-butenal (isopentenal), for the preparation of 3-methyl-2-buten-1-ol (isopentenol), for the preparation of diisopentenyl acetic acid esters for the preparation of isopentenal, and for the preparation of 3, 7-dimethyl-oct-2, 6-dienal (citral), in particular to a process for the preparation of 3, 7-dimethyl-oct-2, 6-dienal. Wherein the aldehyde content in the one or more reactant streams is maintained below a threshold. Furthermore, the present invention relates to product streams of isopentenal, isopentenol, diisopentenyl acetate of isopentenal, and citral, which can be obtained.

A process for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the process comprising subjecting the stream of crude isoprenol or an isoprenol containing fraction thereof to distillation in a low-boiler separation tower operated at a pressure of 2.5 bara or higher to obtain a distillate stream containing aqueous formaldehyde and a bottoms stream containing isoprenol. The process of the invention allows for obtaining isoprenol essentially free of formaldehyde. Further provided is a plant for recovering isoprenol essentially free of formaldehyde from a stream of crude isoprenol containing isoprenol, water and formaldehyde, the plant comprising a first low-boiler separation tower, a second low-boiler separation tower, and a finishing tower.